Magazine and skip-off preventing mechanism for fluid actuated fastener driving machine

ABSTRACT

Improvements to a fluid-actuated fastener driving machine are shown. These include a magazine structure having a container for holding a plurality of fasteners, a stem within the container and a movable guide carried by the stem. A cover overlies the container and a cover ejecting member is connected to the stem. The guide is selectively connectable to the cover. Feed structure is operatively connected to the magazine and includes a track, a door overlying the track, a reciprocatingly movable first feed pawl within the track and a pair of auxiliary feed pawls springably connected to the door, spaced from the first feed pawl and at opposite sides thereof. A fastener ejecting channel is operatively connected with the track and has a holding member disposed therewithin. The member is movable out of the channel by impingement of a driven fastener thereupon.

I United States Patent 13,568,908

[72] Inventor I. Walton Bader 2,229,868 1/1941 Newell, Sr. 227/121UX Brooklyn, N.Y. 3,281,046 10/1966 Boulay 227/126X [21] Appl. No. 775,989 1 3,330,462 7/1967 Colechia eta]. 227/ 136 [22] F'led 1968 Primary ExaminerGranville Y. Custer, Jr. Patented 1971 Attorney-I. Walton Bader [73] Assignee Swingliue Inc.

' Long Island, NY.

ABSTRACT: Improvements to a fluid-actuated fastener driv- [54] M AG AZINE AND SKHLOFF PREVENTING ing machine are shown. These include a magazine structure MECHANISM FOR FLUID ACTUATED FASTENER having a container for holding a plurality of fasteners, a stem wlthll'l the container and a movable guide carried by the stem. DRIVING MACHINE t 10 Claims, 8 Drawing a A cover overlies the contamerand a cover e ecting member is a connected to the stem. The guide 1sselectively connectable to UsS- Cl. u. the cover Feed structure is operatively connected to the 227/109, 227/136 magazine and includes a track, a door overlying the track, a [5 It. Cl. re i ro atingly movable first feed pawl within the track and a Field of Search 227/112, i f auxiliary feed pawls springably connected to the door, 120, 137 spaced from the first feed pawl and! at opposite sides thereof. 56 R f cud A fastener ejecting channelis operatively connected with the l 1 e erences track and has a holding member disposed therewithin. The UNITED STATES PATENTS member is movable out of the channel by impingement of 21 1,125,411 1/1915 Szemerey 227/120UX driven fastener thereupon.

I} I I[I I3 o I i u c I6 v 40 1 I j H 24 38 I937 HHHIJLJ 43 1 F as "r 3 1o m i 36 5 /9 l8 "I l PATENTEDMAR 9197i 3568,5308

SHEET 1 OF 4 INVIiN'I'OR.

I. WALTON BADER 3. R Bug ATTORtNEY PATENTEU MAR 9m SHEET 2 OF 4 INVI NIUR BADER N w h.

l WALTON ATTORNEY PATENTEUMAR 9:971 3,568,908

SHEET 30F 4 A /m Am INVENTOR. I.WALTON BADER BY 3 Wm #4,;

ATTORNEY PATENTEUIHAR 91911 3568308 SHEET 4 [1F 4 INVENTOR.

l. WALTON BADER {9. m MA ATTORNEY MAGAZINE AND sm-ors PREVENTING MECHANISM FOR FLUID ACTUATED FASTENER DRIVING MACHINE DESCRIPTION OF THE INVENTION This invention relates to novel magazine and jam prevention mechanism for a fastener driving machine and constitutes improvements to the structure shown in the patent application of Izaak Walton Bader Ser. No. 695,538 filed Dec. 4, 1967.

The magazine and jam prevention mechanism of this invention has the following advantages:

a. The cover which overlies the magazine is quickly and easily ejectable so as to permit the placing of fasteners within the magazine in a very quick and rapid manner.

b. The feed mechanism employed in connection with the magazine of this invention is likewise very rapid and efficient and prevents the slipping of the fastener to be fed within thedrive channel during the feeding operation.

c. The skip-off prevention mechanism of this invention prevents the improper driving of a fastener within the drive channel if the machine is improperly operated.

The above constitutes a brief description of some of the objects and advantages of this invention. Various other objects and advantages of this invention will become apparent to the reader of this specification as the description proceeds.

The invention will now be described by reference to the accompanying drawings which are made a part of this specification.

FIG. 1 is a side elevational view of a fastener driving machine including the improvements set forth in this invention. Portions of the magazine structure are broken away to show the internal construction.

FIG. 2 is an opposite side elevational view to the structure shown in FIG. 1 with portions of the magazine broken away to show the internal structure.

FIG. 3 is a cross-sectional view of the magazine structure of this invention with the cover in closed position. The adjustments that can be made to the position of the cover in order to accommodate fasteners of different sizes are shown in phantom lines.

FIG. 4 is a bottom plan view of the fastener driving machine containing the improvements of this invention.

FIG. 5 is a fragmentary bottom plan view similar to that of FIG. 4 but with the door which normally overlies the track member of the feed mechanism shown in open position.

FIG. 6 is a fragmentary cross-sectional view of the door member of the feed mechanism of this invention taken along lines 6-6 of FIG. 5.

FIG. 7 is a cross-sectional view of a portion of the feed mechanism of the fastener driving machine of this invention taken along lines 7-7 of FIG. 2.

FIG. 8 is a fragmentary elevational view of the feed mechanism of this invention with the-door partially broken away to show the internal structure.

The invention will now be further described by reference to the specific form thereof as set forth in the accompanying drawings. In this connection, however, the reader is cautioned to note that the specific form of this invention as shown in this specification is for illustrative purposes and for purposes of example only. Various changes and modifications can obviously be made within the spirit and scope of this invention.

The fastener driving machine 11 of this invention is preferably fluid actuated by compressed air which is fed into the device by means of a conduit 12. A trigger button 13 actuates the device and is in turn actuated selectively by either level 14 or extending probe 15. The machine includes a piston member (not shown) which is connected to a driver blade (not shown). The piston and driver blade are operated by valving which is no part of this invention. Structure which can be utilized in connection with the improvements of this inven-- tion are shown in the patent application of Izaak Walton Eader Ser. No. 695,538 filed Dec. 4, I967.

The driver blade is .reciprocatingly movable within a fastener discharge opening 26.

Fasteners for use in this invention are disposed within a top portion and magazine 16 which includes a stem 18 therewithin and an underlying cover 19. The fasteners 17 are disposed within the magazine about stem 18 as shown in FIG. 1.

Thecover 19 is adapted to underlie the magazine and includes a stern portion 20 therewithin which is in turn provided with a plurality of spaced openings 21. Stem 20 of cover 19 is adapted to surround stem 18 which fits within stem 20. 1

Stem 18 is in turn hollow (FIGS. 2 and 3).

A rod 22 is pivotally movable within :stem 18 within opening 42 and includes a projection 23 thereupon at the lower end thereof. A pin 41 is secured to rod 22 and normally biases rod 22 in the position shown in FIG. 3 by the provision of spring 24. It is noted that in this position member 23 is disposed within one of the openings 21 in cover 19 of the magazine.

A cover ejecting member 39 is movably connected to stem 18 and carries a pin 43 which is disposed within opposing slots 44 in stem member 18. A spring 38 is retained on stem 18 between member 39 and retainer 40.

A handle 25 is connected to rod 22 and is retained in position by pin 45. 1

A feed mechanism 46 is adjacent to magazine 16. Feed mechanism 46 includes a track 47 therewithin within which the fasteners 17 are disposed. A door 3 2 is normally biased in open position by spring 34 but is retained in closed position by a latch 37 which abuts a projection 33 upon said door. A first pawl 30 is disposed within a slot 48 provided within track 47 and is reciprocatingly movable. Pawl 30 is normally biased in its rearward position by spring 31.

Paw] 30 is actuated forwardly by means of a piston member (not shown) which is movable forwardly when the fastener driving machine is in rest position and is urged rearwardly by spring 31 when the device is tired. The specific structure for actuating the pawl forms no part of this invention but is described in detail in the copending patent application of Izaak Walton Bader Ser. No. 695,538 filed Dec. 4, I967. In particular the structure is shown clearly in FIG. 4 of that application.

Upon door 32 are a plurality of additional feed pawls 35 which, when door 32 is in closed position, are spaced from pawl 30 on opposite sides thereof. It is noted that pawls 30 and 35 both bear ratchet portions thereupon. I

Pawls 35 are spring loaded by means of leaf spring 36 located upon door 32.

Within fasteners driving opening 26 is skip-off preventing element 27 which is disposed within a lateral slot 50 which opens into opening 26. 1

A spring 28 has one end disposed within a recess 29 which is connected to the track portion of the feed mechanism of this invention and is also disposed about pin 28a which controls pivotal movement of member 27.

With the foregoing specific description of this invention the operation thereof can now be explained.

A plurality of fasteners 17 are disposed about stem 18. The cover 19 of the magazine is then snapped into place by moving it upwardly until projection 23 snaps into the appropriate opening 21. It is noted that cover 19 will be pushed within the magazine until the further inward movement is blocked by the fasteners themselves and member 23 will engage in one of the recesses 21. This type of structure provides for an automatic adjustment of magazine size for different sizes of fasteners.

It is noted that as cover 19 is moved into engagement with the remainder of the magazine cover ejecting member 33 will bear against the stem portion 20 of the cover (FIG. 3).

Also by reason of the position of rod 22 this rod will automatically permit the cover of the magazine to be engaged.

The fasteners are then-placed upon track 47 of the feed mechanism and the door 32 is placed in closed position. The fastener driving machine is then actuated by pulling the trigger. This will cause reciprocatingly movable pawl 30 to move forwardly pushing the fasteners forwardly and sequen' tially into abutting relationship with opening 26. It is noted that auxiliary feed pawls 35 are not movable but, these pawls are spring biased and include ratchet portions thereupon which permits forward movement of the fasteners but blocks retrograde movement thereof. Thus, the forward movement of pawl 30 will cause the fasteners to slide over the ratchet portions of auxiliary pawls 35.

Normally, in the rest position of the machine of this invention, member 27 is in blocking position beneath the point of the fastener to be driven. This holds the fastener in a straight position prior to its initial drive. The driver blade of the machine is then actuated which drives the fastener into work. As the fastener is so driven the point thereof abuts member 27 which then moves pivotally downwardly away from its position within opening 26 and will permit the fastener to drive. However, because of the initial position of member 27 the drive of the fastener is straight and true and is properly driven into work. However as soon as the fastener leaves opening 26 then member 27 will again be biased into blocking position beneath the point of another fastener which will be placed into opening 26 by means of the operation of the feed mechanism. The process is then repeated.

If member 27 were not provided, particularly in the case of a short fastener the angle of egress of the fastener might not be entirely vertical and the fastener would skip-off and might either miss the work entirely or would be driven at an angle within the work.

I claim:

1. A magazine structure for a fastener driving machine comprising a fastener holding container, a first hollow stem within said container, a rod pivotally movable within said stem having a prong at its lower portion, a cover underlying said fastener holding container having a second hollow stem portion adapted to fit about said first hollow stem portion and provided with a plurality of spaced recesses therewithin adapted to be selectively engaged by said prong.

2. A magazine structure as described in claim 1 including a spring means carried by said rod biasing said rod in engaged position with one of said recesses and handle means upon said rod at one end thereof.

3. A magazine structure as described in claim 2 including a cover ejecting member carried by saidfirst-named stem.

4. A magazine structure as described in claim 3 said cover ejecting member including a pusher member carried by said rod and adapted to abut the stem portion of said cover and spring means biasing said pusher member against said stem.

5. A magazine structure as described in claim 4 said firstnamed stem member provided with a hollow elongate slot therewithin, said pusher member having a projection disposed within said elongate slot.

6. A feed mechanism for a fastener driving machine comprising a fastener track, a pivotal openable door overlying said track, means for selectively retaining said door in open or closed position, first fastener feed means within said track, a pair of spaced feed pawls carried by said door having ratchet portions thereupon, and spring means upon said door connected to said feed pawls.

7. A feed mechanism as described in claim 6 said spring means being a single leaf spring.

8. A feed mechanism as described in claim 7 including spring means connected to said door and said track and biasing said door into open position.

9. A structure as described in claim 1 including a feed mechanism adjacent said magazine, said feed mechanism comprising a fastener track, a pivotal openable door overlying said track, spring means connected to said door and to said track normally biasing said door into open position, first fastener feed means within said track, latch means carried by said door and said track, a pair of spaced feed pawls carried by said door having ratchet portions thereupon, and a single leaf spring carried by said door and connected to said feed pawls.

10. A structure as described in claim 9 including a drive improvement mechanism having, in combination, a drive channel provided with a lateral slot openin; thereinto, a pivotally movable holding element within said cnannel and said lateral slot, said holding element being below the undriven position of a nail disposed within said drive channel, coil spring means secured to said feed mechanism and to said holding element normally maintaining said holding element in blocking position with respect to said nail, said holding element moving to unblocking position with respect to said nail as soon as said nail is driven from said channel and abuts said holding element. 

1. A magazine structure for a fastener driving machine comprising a fastener holding container, a first hollow stem within said container, a rod pivotally movable within said stem having a prong at its'' lower portion, a cover underlying said fastener holding container having a second hollow stem portion adapted to fit about said first hollow stem portion and provided with a plurality of spaced recesses therewithin adapted to be selectively engaged by said prong.
 2. A magazine structure as described in claim 1 including a spring means carried by said rod biasing said rod in engaged position with one of said recesses and handle means upon said rod at one end thereof.
 3. A magazine structure as described in claim 2 including a cover ejecting member carried by said first-named stem.
 4. A magazine structure as described in claim 3 said cover ejecting member including a pusher member carried by said rod and adapted to abut the stem portion of said cover and spring means biasing said pusher member aGainst said stem.
 5. A magazine structure as described in claim 4 said first-named stem member provided with a hollow elongate slot therewithin, said pusher member having a projection disposed within said elongate slot.
 6. A feed mechanism for a fastener driving machine comprising a fastener track, a pivotal openable door overlying said track, means for selectively retaining said door in open or closed position, first fastener feed means within said track, a pair of spaced feed pawls carried by said door having ratchet portions thereupon, and spring means upon said door connected to said feed pawls.
 7. A feed mechanism as described in claim 6 said spring means being a single leaf spring.
 8. A feed mechanism as described in claim 7 including spring means connected to said door and said track and biasing said door into open position.
 9. A structure as described in claim 1 including a feed mechanism adjacent said magazine, said feed mechanism comprising a fastener track, a pivotal openable door overlying said track, spring means connected to said door and to said track normally biasing said door into open position, first fastener feed means within said track, latch means carried by said door and said track, a pair of spaced feed pawls carried by said door having ratchet portions thereupon, and a single leaf spring carried by said door and connected to said feed pawls.
 10. A structure as described in claim 9 including a drive improvement mechanism having, in combination, a drive channel provided with a lateral slot opening thereinto, a pivotally movable holding element within said channel and said lateral slot, said holding element being below the undriven position of a nail disposed within said drive channel, coil spring means secured to said feed mechanism and to said holding element normally maintaining said holding element in blocking position with respect to said nail, said holding element moving to unblocking position with respect to said nail as soon as said nail is driven from said channel and abuts said holding element. 